Do the reasons behind a retcon actually make the retcon worse? Or is it the retcon that really matters?
(i.E. Black Fury JR to make it closer to the movieverse. Pietro and Wanda we're not mutants nor Magnetos anymore, so marvel has our movie rights. Ice-Gay-Man to promote diversity or to pander a particular readership - you choose which. Wanda doesn't remember her children and is nuts because the writer is too lazy to actually come up with a trigger to fit his story that actuallt fits with past Marvel writer's stories. Etc...)
Peace